I spent a weekend connecting every MCP server that sounded useful. By Sunday night I had 11 running, a claude_desktop_config.json that scrolled off the screen, and an agent that was technically capable of doing almost anything. In practice, it was doing almost nothing useful. What I learned had very little to do with which servers are "good." The List Looks Better Than It Performs The MCP ecosystem has exploded. There are directories with thousands of servers now. You can connect your agent to GitHub, Notion, Google Drive, Slack, your calendar, your email, your databases, your browser, a web search tool, a weather API, and about 40 other things I cannot remember anymore. The pitch is always the same: connect everything and your agent becomes superhuman. What nobody tells you is what happens to your context window when you do. Every MCP server shows up in your agent's prompt as a block of tool definitions: name, description, parameter schema. This is not free.…